Chicken fettuccine Alfredo & garlic

Ingredients : 2 boneless chicken breasts2 tablespoons blackening seasoning1/2 chopped onion1/2 chopped bell pepper3 or 4 cloves minced garlic1/8 teaspoon red pepper flake (optional)1/8 teaspoon salt1/2 teaspoon blackpepper1 teaspoon old…